Tutorial Exercise The cell of an amoeba had an estimated volume of 1425 um (cubic micrometers). Convert this volume to m (cubic meters). Step 1 of 3 Consult a table of units. Write the conversion factor that equates two SI or metric units of interest. 1 m = 1 x 10- um Submit Skip (you cannot come back)
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- The recommended adult dose of Elixophyllin, a drug used to treat asthma, is 6.00 mg/kg of body mass. Calculate the dose in milligrams for a 166-lb person. 1 lb = 453.59 g Please show work using train track method.For devices in which variable volumes can be measured “by eye”, you are entitled to estimate (interpolate) between the finest divisions of any scale on the device. For a graduated cylinder, the finest division is 0.2 mL, for the beaker, it is probably greater than 1 mL,. The volumetric pipetter is not a variable volume device; it only measures the indicated volume; for a 10 mL pipette at the index mark, it is accurate to 0.01 mL What should you write in your lab notebook if you measure 10 mL of a liquid as accurately as you can by eye using each of these devices? a) graduated cylinder b) beaker c) volumetric pipetteEstimated volume of crucible 25.5 mL Measured volume of crucible 30.05 mL Percent error of estimate Volume in: kL cL
- Stock strength of a drug is 50mg/2ml a client weight is administered 25mg/ kg what volume of drug should be given?A patient's cardiac output is measured using the Fick's method. The spirometer measures an oxygen content of 32.5 mL for every 225 mL of arterial blood. The spirometer also measures 30 mL of oxygen for every 800 mL of venous blood. If the oxygen uptake is 500 mL/min, find the cardiac output in mL/min.4. A student measures the density of an Unknown liquid 3times and obtains an average density of 0.705g/mL with a Standard Deviation of 0.352g/mL. 1.What can you say.If anything about the Precision of the measurements? 2.What can you say if anything about the Accuracy of the average density?
- a. If 55mg of CaC2O4 is placed in a 250mL pack of H2O nanopure at 25 celcius, how much (in mg) of CaC2O4 remains undesolved? b. If 100mg of CaC2O4 is placed in a 500mL pack of HCl at 25 celcius, how much (in mg) of CaC2O4 remains undesolved? FM: 128g/mol Pksp= 7.90Sources of error: Method 1 Equipment:About ten grams of NaHCo3. 10 ml distilled waterSmall beaker Electronic balanceGlass dome10 ml graduated cylinderGlass rod Safety instructions :Wear safety goggles Wear a smockBe deilcate with materials Method:Measure out 10 ml of distilled water using the graduated cylinder. Transfer the water to the small beaker.Weigh out the total amount of sodium chloride available for the experiment.Weigh out 0.5 g NaHCo3. Add NaHCo3 to beaker containing water. Stir solution with glass rod until dissolved.Repeat step 3 until it becomes more difficult to dissolve the NaHCo3. Note the number of times 0.5 g NaHCo3 is added.Continue adding one grain of NaHCo3 at a time until it is no longer possible to dissolve it.Once saturation is reached, NaHCo3 crystals form at the bottom of the beaker.Measure the mass of NaHCo3 not added to determine the total amount of NaHCo3 that has exceeded the solubility limit.Give typed solution not written How many milligrams in 1.26 scruples? 3 scruples = 1 dram 1 oz = 8 drams 1 apothecary lb = 12 oz 1.2153 apothecary lb = 1 English lb 1kg = 2.20462 English lbs Round answer to proper sig figs.
- Which of the procedures, if either, is more accurate when making a 1/501/50 dilution of a solution? a)Transfer 1 mL1 mL with a pipet into a 50-mL50-mL volumetric flask. b)Both procedures have the same accuracy. c)Transfer 20 mL20 mL with a pipet into a 1-L1-L volumetric flask. How can the accuracy of either procedure be improved? a)Instead of using a 1/501/50 dilution to make the solution, weigh out the material on a balance and transfer it directly to the volumetric flask. b)Use an Erlenmeyer flask instead of a volumetric flask. c)Calibrate each piece of glassware. d)Use a graduated cylinder instead of a pipet for the transfer.An analysis of city drinking water for total hardness was done by two students in the laboratory and produced the following results (in ppm CaCO3): Student A: 228.3, 226.4, 226.9, 227.1, and 228.6. Student B: 229.5, 226.1, 230.7, 223.8, and 227.5 1] Calculate the following for each data set: a) mean b) median c) standard deviation d) coefficient of variation e) the 95% confidence interval for the meanStandard deviation 0.6318 mL, 0.1216 mL, 0.1056 mL, 0.0681 mL, 0.0056 mL Mean-0.18654 mL